A Set of New Sealed Power Pistons, For Chevrolet 454 Engines with 6.135" Rod. Includes: Piston Rings, Piston Pins, Locking Rings. Recommended Bore 4.2800-4.2810 Sealed Power # 8KH426CP .030, (Piston H426CP .030) Domed with Valve Reliefs. This is a New Set of Pistons that came with a Block we purchased and reselling the set of Pistons.